Granted Patent
Utility
US 6,047,237 · App. 08/987,946
Compass precalibration method
Inventor:
Mark Michmerhuizen
Patented Case
View Patent ↗
Granted: Apr 4, 2000
Filed: Dec 10, 1997
Inventor
Mark Michmerhuizen
Assignee (at issue)
Prince Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.